#include <stdio.h>
#include <string.h>

#define TRIANGLE_SQUARE(bottom, high) ((bottom * high) * 0.5)

unsigned int my_strlen(const char *str)
{
    return 0;
}

int my_strcmp(const char *str1, const char *str2)
{
    return 1;
}

char *my_strcpy(char *dest, const char *src)
{
    return "";
}

int main(int argc, char const *argv[])
{
    double ret = TRIANGLE_SQUARE(9, 8);
    printf("%f\n", ret);
    return 0;
}
